Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3465d53aa881b0418ac948cfa20dab5db876007369c67c66eb051dce96025e03' 
  AND token = 'RETRtbXOk53f479fgqcAiviBAfNgL6BWc3hFCddsexs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}